Buffer-check for loom-pickers



H. IVI. GUSDORF.

BUFFER CHECK FOR LOOM PICKEHS.

APPLICATION FILED FEB.I9, 1921.

Patented Apr. 26, 1921.

WIFI-II IIIISI II T r www' UNlTEDsTAT-Es IEBOLD M. G'USDORF,OIF-INDIANAPOLIS, 4INDIANA.

PATENr-oFFlcE.

BUFFER-GHECK FOR LOOM-PICKEB'S.

.Specification of Letters Patent. i v-P-flfented A131126, 1921.

Applicationl led February 19, 1921. Seria1-No.'446,444.

To all whom af raycomm f Be it known that' I, HAROLD M. GUsDoRr,

a citizen of the United States, residing at Indianapolis, in the countyvof'Marion and State oflndiana, havefinvented new and useful Improvementsin Buffer-Checks for- A by contact with a device called the picker,

whichslideson a rod or .a pair of parallel rods and has a portionprojecting into the path of the-shuttle. l i

vThe picker, acted on by the picker-stick, affords a yielding resistanceto the shuttle,

minimizing the blows from and reversing the travel of the latter.Springs of various forms `and materials have been suggested' and triedas bumper-checks for the picker, but, .owing to' the rapid andinnumerable stressesto which they are subjected, metal nspringswa'revlacking in durability and a resil'ient leathervhas been-found to givethe bestresults.

But even the best rades of leather have .been comparativelyshort lived.

The object of this invention is to provide a recoilV strap as abiunper-check for loompickersfwhich will` be of superior resiliencyv and.of great durability and in the solution of this problem the conceptiontoward which Ihave worked has been a 'strap of appreciable thicknesswith a middle longitudinal strong and non-elastic material `betweenlayers vof elastic material pitted on their outer surfacesv withcup-like depressions which distribute the rending strain on the outercurve when'the strap is bent and provide room for the compacted materialof the-inner curve; the elasticity of the material of the walls of thecups tending on both sides to restore the cups to their normal shape.

I accomplish the above, and other objects which will hereinafter appear,by the means shown in the accompanying drawings, in whichj Figure 1 is atop plan view of the shuttle and shuttle box of a loom-with a picker androd, and having a bumper-'check made in accordance with the teachings ofmy invention. Fig. 2 is a front elevation of same with the box andshuttle removed. Fig. 3 is a longitudinal section of my improvedmaterial in the flat. Fig. 4 is a like section of same in bent positionshowing howv the cups are expanded on the outervportionl or curve andcompressed on the inner curve of the strap, and Fig. 5 isa viewv in sideeleva-'5 tionof a modified application of the strap.

Like characters of reference indicate-like"V parts in the several viewsof the drawing.

Referring particularly to Fig. 1, the shuttle 6, shuttle-box 7 A inwhich the4 shuttle is reciprocated, picker 8, picker-rod l() on whichthe picker is slidingly mounted, frame-supports 11, 1,1, for thepicker-rod,

and the picker-stick 12 entering a slot inthe picker and having .means(not shown) for moving the stick and through it the` picker in a mannerto shoot the shuttle to the opposite picker are all,old and Well known.The drawing shows the picker mounted on a single rod but in some loomsthere..are two parallel rods (not shown).

My invention relates to the bumper-check here shown as the recoil straps13, 13, whichA are located at each end of each box.

The preferred form for the assembly of these straps 13 is that of theletter S, with holes formed therein through which the picker-rod 10passes in the manner shown invFigs. V1 and 2, but this is sometimesmodil'ied as shown in Fig. 5. The special construction of these strapsconstitutes the essential feature of this invention and comprises amiddle portion 14- of strong and practically inelastic material, betweenequal "layers of elastic material 15, indented with cups 16. This may beentirely produced by artificial means, as by coating both sides of a.woven-fabric with elastic rubber ,or like suitable material' havingcup-like indentations in each of the elastic surfaces; or out of leatherto which similar cups have been imparted. But in practice I havediscovered that the best results were obtained -by forming the strapiromtwo other stra-ps of pigskin leather with the grain side in and cementedtogether.

In the operation of my invention ,a strap formed as above described willbend in-v definitely without breaking bythe closing together of thewalls of the cups on its inner L side.

IVhile I have here shown and 'described my invention as applied tobuffers for looms it is obvious that it is valuable for use in manyother mechanisms and I therefore do not desire to limit itsapplication,'but what I claim is i f l. A buffer strap having apractically inelastic portion between elastic portions hav-y ing outersurfaces pitted with cup-like indentations.

2. A butter-strap having a longitudinal member of the same Width as thestrap ot practically inelastic material vand elastic members on eachside of said inelastic member united with the latter, said elasticmembers having outer surfaces pitted with cup-like indentations.

'3. A butter-strap formed from two units 20 each having one side moreelastic than the other the surfaces of the more elastic sides havingcup-like indentations and the less elastic sides of the two units beingunited to each other. l

4. A buffer-strapy having a practically inelastic longitudinal portionand coextensive elastic portions on each side integral therewiththeoutersurfaces of the elastic portions being numerously provided withcuplike indentations.

l Signed at Indianapolis, Indiana, this the 17 day of February 1921..

- HAROLD M. GUSDORF.

